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Helper II
Helper II

BUG - OnChange of cascading dropdown does not activate

Let's say you have two dropdowns (both linked to the same SharePoint list). The list has two columns: Categories and Problems. In PowerApps, you have the option to make a dropdown dependent on another dropdown to limit the visible options. So you have two drop downs: one for Categories and one for Problems. You make Problems dependent on Categories and use a filter formula to limit available Problems only to the chosen Category.

 

Here's the problem. You put a formula into the OnChange function of the Problems dropdown to save some data into a variable. Now, try selecting something different in the Category drop down. The OnChange of the Problems dropdown never fires. This is what I mean by "OnChange of cascading dropdown does not activate". The OnChange function of the Categories drop down will work, since you choose it manually. But it seems that programmatic firing of the OnChange event handler does not happen. This is a problem, because if the user wants to stay with the first option presented in the Problems dropdown, they will never manually change the Problems drop down. (Note that the Problems drop down visually changes, it just doesn't fire the OnChange event.)

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